Read the excerpt from The Diary of Anne Frank and answer the question that follows.

Peter (to MIEP). Maybe Mouschi went back to our house . . . they say that cats . . . Do you ever get over there . . . ? I mean . . . do you suppose you could . . . ?

Miep. I’ll try, Peter. The first minute I get, I’ll try. But I’m afraid, with him gone a week . . .

Dussel. Make up your mind, already someone has had a nice big dinner from that cat!

[PETER is furious, inarticulate. He starts toward DUSSEL as if to hit him. MR. FRANK stops him. MRS. FRANK speaks quickly to ease the situation.]

What is the meaning of the word "inarticulate" as it is used in this passage?

combative
talkative
angry
speechless